Go back to posting onTaskInfoChanged callback

It is possible for us to send onTaskInfoChanged before onTaskAppear
callbak since we post onTaskAppear but we don't post onTaskInfoChanged.
The change was introduced in ag/12719145, however we have to rethink how
we want to approach whatever problem we are trying to solve there in a
way that doesn't affect callback ordering.

Fixes: 172196078
Bug: 167447693
Bug: 171306573
Test: Timing issue that is ver difficult to test
Change-Id: I39cdc241cec1729487dd111af593724cf04e1e8d